no delete icons

Did the update to 3.0.5.1, and every works EXCEPT no delete icons. Anywhere. I can see in the table the date, but I see no image tag, and the CSS is giving me a headache.

Any ideas? Everything seems to be there, except the delete buttons so I can remove a DNS zone. And of course this server provides DNS for the shop, so it means we can't even see the correct server because this zone thinks it's authoritative...

The icons show up here on my install. Do you use a custom theme? If yes, then you will have to adapt it to be compatible with the new ispconfig version as the default theme has been changed form 3.0.4.6 to 3.0.5.